1. Department of ChemistryDong‐A University Busan 604‐714 South Korea
2. College of Medicine, Dong‐A University Busan 604‐714 South Korea
3. Southwest Medi‐Chem Institute Busan South Korea
4. Department of Chemistry and BiochemistryQueens College and the Graduate Center of the City University of New York Queens NY 11367‐1597 USA
5. Sejoong CNG Co., LTD, 77, Najeon 2sandan‐gil, Saengnim‐myeon, Gimhae‐si Gyeongsangnam‐do South Korea